Long coat Robin perhaps draped across equine (7)
I believe the answer is:
cassock
'long coat' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'robin perhaps draped across equine' is the wordplay.
I cannot really see how this works, but
'equine' could be 'ass' (ass is a kind of equine) and 'ass' is located in the answer.
'robin perhaps' could be 'cock' (as in the nursery rhyme Who Killed Cock Robin) and 'cock' is present in the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for cassock that I've seen before include "Cossack (anag.)" , "Full-length garment for Christian clergy or choir" , "Long garment worn by priests" , "Clergyman's robe" , "Vestment" .)